Alby b



A. B. McDOLE.

PAINTING APPARATUS.

APPLICATION FILED MAY 5,1919.

Patented July 29, 1919.

W zwqya ALBY IB. MODULE, F BUIFALO, NEW YORK.

PAINTING APPARATUS.

Specification of Letters I'atent.

Patented July 29, 1919.

Application med May}, 1919. Serial No. 294,786.

To all whom it may concern:

Be itknown that I, ALBY B. MoDoLn, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Im rovements in Painting Apparatus, of

whlch the following is a specification.

' the liquid apparatus.

This invention relates to painting apparatus' of the class comprising a spray nozzle which is moved over the surface to be painted, and a supply tank from which paint is delivered to the nozzle and which 1s maintained under air-pressure to expel the paint with the necessary force to form the desired spray.

To obtain the best results, a spray-nozzle having a comparativel small bore is used, ut unless the paint is thoroughly mixed and kept free from lumps the nozzle becomes clogged, requiring it to be frequently cleaned and causing delays. The object of my invention is the provision of effective and reliable means for thoroughly mixin the paint and at the same time efi'ectua ly brealn'ng up all lumps before they reach the spray-nozzle, in order to insure a steady and uninterrupted discharge of the paint from'the nozzle.

In the accompanying drawings:

Figure 1 is a longitudinal section of the Fig. 2 1s a transverse central section thereof. Fig. 3 is a longitudinal section, on an enlarged scale, of the removable. plug carrying the screen. Fig. 4. is a. to plan view of said plug and screen.

imilar characters of reference indicate corresponding parts'through-out the several 5 views.

vpaint which may be intro 1 indicates the paint-supply and mix-in tank adapted to contain a uantity of liqui duced through an openi in the top of the tank normally closed y a screw plug 2. This tank may be 'of any suitable form, but is preferably cylindrical. Leading to the upper portion nozzle forms no part of my invention and may be of any ordinary construction. A shutrofi' and controlling valve 7 is located in the discharge pipe.

Applied to the open lower end of the discharge pipe is a screen 8 of the proper mesh to intercept lumps or unmixed particles of the paint. This screen may be of any suitable form and construction, but is preferably conical and carried by a removable plug 9 screwed into an opening in the bottom of e the tank. This plug has a conical neck or upward extension 10 of skeleton or apertured construction which is encircled by the screen and which is suitably held in place thereon. In its upper end this neck is rovidcd with an opening 11 which receives t e open lower end 'of the discharge pipe 4, which is loosely fitted therein to permit the ready removal of the screen by simply unscrewing the plug 9. The plug has a grooved flange 9 for receiving a packing gasket 9".

Cooperating with the screen, is a suitable mechanical appliance for inducing a current or currents of the liquid-paint against one or more sides of the screen, of sufii-' pellers are located in proximity to opposite sides of the screen and their blades are arranged right and left, or in other words the blades of both ropellers trend toward the screen, so that though they are turned in the same direction, they produce contrary currents which clash at the screen with the result above described.

While serving to agitate and mix the paint in the tank, these ropellers thus per-. 7

of the tank-is an inlet pipe 3 for compressed aform the important ad ltional. function of air which is connected with a. suitable compressor, not shown in the drawings.

, 4 indicates the paint discharge pipe-communicating with the lower portion of the tank space and extending through a stuin'ng box 5 in the top of the tank. Connected with the outer end of this pipe is the usual hose terminating in the spray-nozzle 6. This keeping the mixture free from lumps liable to clog the spraying nozzle 6, thereby maintainin a practically continuous supply of well-mixed paint to the nozzle and, by avoiding interruptions in the Work, obtaining the maximum, painting capacity of the apparatus.

Should the screen require repair or renewal, this can .be quickly and conveniently I mdependent of the air-pressure in the tank 4 for inducing a current of the paint against the sideof said screen. i

2. A painting apparatus, comprising a pressure-tank adapted to contain liquid'paint and having a discharge pipe, a screen ap plied to the mouth of said pipe, and currentinducing devices arranged in the tank adjacent to opposite sides of said screen and both trending toward the same.

3. A painting apparatus, comprising apressure-tank adapted to contain liquid paint and having a discharge pipe,a screen appropellers. arranged in the tank on opposite sides of the screen, the blades of both pro plied to the mouth of said pipe, and rotary pellers trending toward the screen.

.trending toward the screen.

I neck.

4. paintin apparatus, comprising apressure-tank a apted to contain liquid paint and having adischarge pipe, a screen ap plied to the mouth of said pipe, a rotary,

shaft arranged in the tank, and prppellers mounted on said shaft onopposite sides of said screen, the blades of both 5. A painting apparatus, comprising a pressure-tank adapted to contain liquid paint and having -'a discharge pipe, a'plug arranged in the bottom of the tank and provided within the same With an apertured neckcommunicating with said discharge pipe, and ascreen applied to said neck.

6. A painting apparatus, comprising a pressure-tank adapted to contain liquid tank an provided Within the same with an apertured neck, said neck having an opening which receives the lower end of said discharge pipe, and a screen encircling said ALBY- B...McDOLE.

propellers paint and having a discharge pipe, a removable lug arranged inthe bottom of the 

